Modern combustion-electric PowerPack drive system design solutions for a hybrid two-unit rail vehicle

The article presents considerations regarding the possibility of recovering braking energy of a rail vehicle. The energy parameters obtained during acceleration and braking of the loaded bus were taken as input data. It was found that over 13 kWh of energy was lost irretrievably in the braking resistors. Due to the speed of the discussed process, capacitors with an original design were proposed for energy recovery. For the purposes of this study, electrodes were fabricated using carbon derived from lignin carbonization at two distinct temperatures: 900°C and 1000°C. Based on the electrochemical tests carried out, it was found that the second proposed solution achieves a significantly better power-to-weight ratio – 13 kW/kg.

“…Assuming that C 1 = C 2 = Cell electrodes and substituting these values into formula (2), one obtains the following relationship as shown in (3).…”

Section: Development Of New Capacitors Utilizing Carbon Derived From ...mentioning

confidence: 99%

“…developing hybrid designs, designing drives based on fuel cells, creation of exhaust gas after treatment systems etc. [3,12,13]. However, these activities require continuous research in order to obtain maximum benefits ecologically but also economically [7,14].…”

Section: Introductionmentioning

confidence: 99%

Integration of capacitors with carbon - lignin based electrodes in rail vehicles for enhanced energy efficiency

Kurc,

Woźniak,

Rymaniak

et al. 2023

“…in the combustion segment there are two power generators that enable driving in the combustion mode (Fig. 3) [8], and in the electric segment devices necessary for the collection and processing of electric energy from overhead electric traction. Table 1 shows the 227M vehicle technical parameters.…”

Section: Examples Of Alternative Drive Systems In Modern Rail Vehicle...mentioning

confidence: 99%

Analysis of the selection of the auxiliary drive system for a special purpose hybrid rail vehicle

Urbański¹,

Gallas²,

Stachowicz³

et al. 2022

Self Cite

Strict emission standards mean that the internal combustion engines used in means of transport must meet the standards for the emission of harmful compounds. For this reason, there is an increase in the use of alternative sources of propulsion, including rail transport. The article presents unconventional solutions of drive systems in rail vehicles using hybrid systems and fuel cells. The concept of the realizing project of a special-purpose rail vehicle, which is to be able to be driven from three different sources, was presented. Considerations concerning the selection of the internal combustion propulsion system, which is to be used as an auxiliary in the vehicle, are described. The possibilities of installing the power unit on the vehicle were also presented.

“…This solution allows you to reduce energy consumption by approximately 30% [38]. capacitor from Eaton [9,30] In the case of electric multiple units, during intensive braking, it is possible to implement electrodynamic braking with a blending function on the drive bogies (so-called brake blending) [12]. The majority of the braking force is provided by the electrodynamic brake; in the first phase of braking, depending on the set braking force on the travel and braking controller, the friction brake (electro-pneumatic EP) is used to a small extent, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Model of energy consumption by brake discs of rail vehicles

Sawczuk,

Jüngst,

Kaczmarek

2024

The aim of the article is to present a computational model to determine the losses generated by the brake discs of rail vehicles. The energy consumption of the disc (energy losses) is divided into inertia losses and fan losses. The article is preceded by a review of the design solutions of brake discs of rail vehicles in terms of their ventilation and cooling after braking. Particular attention was paid to three types of brake disc designs with ventilation blades, bars and other shapes of ventilation bridges, and how the ventilation of these discs affects energy losses. On the one hand, forced ventilation of brake discs shortens the cooling time after intensive braking, on the other hand, it causes energy losses due to forced ventilation when the brakes are not used. The article presents the state of knowledge regarding the cooling efficiency of brake discs as a result of forced ventilation and presents a method for calculating the energy consumption generated by the brake disc in relation to the rotational speed. The energy losses were divided in the article into inertia losses due to the rotating mass and losses on the fan, in which the energy necessary for the rotation of the brake disc was determined from the method of calculating centrifugal fans with known geometric dimensions.